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化学工业与工程 2004, Vol. 21 Issue (6) :398-405    DOI:
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用分子结构固有频率估算卤代烷理想气体和液体的热容
仇明华,曹晨忠,曾荣今
湖南科技大学化学化工学院,湖南科技大学化学化工学院,湖南科技大学化学化工学院 湖南湘潭411201 ,湖南湘潭411201 ,湖南湘潭411201
Calculation of Thermal Capacity for Haloalkanes by Molecular Structure Vibration Nature Frequencies
QIU Ming-hua, CAO Chen-zhong, ZENG Rong-jin (Department of Chemistry, Hunan University of Science and Technology, Hunan Xiangtan 411201, China)
(Department of Chemistry, Hunan University of Science and Technology, Hunan Xiangtan 411201, China

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摘要 把卤代烷分子当作多自由度自由振动系统处理,分子中的原子或基团当作系统中的分散质点,化学键当作系统中连接各分散质点的弹簧。用机械振动理论求解系统的固有频率(ωi),选择基频(ω0)和总频(∑ωi)连同分子系统中的总质点数(N)和主链上的C—H键数(nH)作为分子结∑ωi+a3nH+a4N,用同温度构信息指数,建立定量结构-热容关系模型:Cp=a0+a1ω0+a2下卤代烷理想气体热容、液体热容和不同温度下理想气体热容数据,对该模型进行多元回归分析,得到预测方程,预测结果与实验值的相关系数均大于0 996。
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仇明华
曹晨忠
曾荣今
关键词分子振动   固有频率   卤代烷烃   热容     
Abstract: A haloalkane molecule can be treated as a system of multi-freedom vibration. Using the method of modal analysis method of theory of vibration, the fundamental frequency and total frequency are calculated. The fundamental frequency (ω_0), the total frequency (∑ω_i), the numbers of the mass-points (N) and the numbers of (C—H) in the molecules (n_H) are selected as structural information indices of the molecules. The QSPR model is expressed as:C_p=a_0+a_1ω_0+a_2∑ω_i+a_3n_H+a_4N.Based on the model, the multivariate regression analyses are performed in the data sets at the same temperature, and the different temperature. The relationship between the structural indices and the properties may be expressed in a secondary polynomial function of (1/T). The correlation coefficients are more than 0.996.
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Received 2004-11-15; published 2004-11-15
引用本文:   
仇明华,曹晨忠,曾荣今.用分子结构固有频率估算卤代烷理想气体和液体的热容[J].  化学工业与工程, 2004,21(6): 398-405
QIU Ming-hua, CAO Chen-zhong, ZENG Rong-jin .Calculation of Thermal Capacity for Haloalkanes by Molecular Structure Vibration Nature Frequencies[J].  Chemcial Industry and Engineering, 2004,21(6): 398-405
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